在Laravel 5.4上使用php artisan make:auth迁移错误
[Illuminate\Database\QueryException] SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter tabl e users add unique users_email_unique(email)) [PDOException] SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes
当前回答
这很常见，因为Laravel 5.4将默认数据库字符集更改为utf8mb4。你要做的是:编辑你的App\Providers.php，把这段代码放在类声明之前
use Illuminate\Support\Facades\Schema;
另外，将此添加到'boot'功能 模式:defaultStringLength (191);
其他回答
对于这个错误，我找到了两个解决方案
选项1:
打开database/migrations文件夹下的user和password_reset表
只需要改变邮件的长度:
$table->string('email',191)->unique();
选项2:
打开app/Providers/AppServiceProvider.php文件，在boot()方法中设置一个默认字符串长度:
use Illuminate\Support\Facades\Schema;
public function boot()
{
Schema::defaultStringLength(191);
}
首先删除本地主机中数据库的所有表
更改Laravel默认数据库(utf8mb4)在config/database.php文件中的属性为:
'charset' => 'utf8'， 'collation' => 'utf8_unicode_ci'，
之后 更改我的本地数据库属性utf8_unicode_ci。 PHP工匠迁移 没关系。
如前所述，我们在App/Providers中添加到AppServiceProvider.php
use Illuminate\Support\Facades\Schema; // add this
/**
* Bootstrap any application services.
*
* @return void
*/
public function boot()
{
Schema::defaultStringLength(191); // also this line
}
你可以在下面的链接中看到更多细节(搜索“索引长度& MySQL / MariaDB”) https://laravel.com/docs/5.5/migrations
BUT WELL THAT's not what I published all about! the thing is even when doing the above you will likely to get another error (that's when you run php artisan migrate command and because of the problem of the length, the operation will likely stuck in the middle. solution is below, and the user table is likely created without the rest or not totally correctly) we need to roll back. the default roll back will not work. because the operation of migration didn't like finish. you need to delete the new created tables in the database manually.
我们可以这样做使用修补器如下所示:
L:\todos> php artisan tinker
Psy Shell v0.8.15 (PHP 7.1.10 — cli) by Justin Hileman
>>> Schema::drop('users')
=> null
我自己有一个问题与用户表。
之后你就可以开始了
PHP artisan migrate:回滚
PHP工匠迁移
腔:
添加到。env文件
DB_ENGINE=InnoDB
推荐的解决方案是启用MySQL的innodb_large_prefix选项，这样你就不会陷入后续的问题。下面是如何做到这一点:
打开my.ini MySQL配置文件，并像这样在[mysqld]行下添加以下行。
[mysqld]
innodb_file_format = Barracuda
innodb_large_prefix = 1
innodb_file_per_table = ON
之后，保存更改并重新启动MySQL服务。
如果需要回滚，然后重新运行迁移。
如果您的问题仍然存在，请转到数据库配置文件并设置
'engine' => null, to 'engine' => 'innodb row_format=dynamic'
希望能有所帮助!
